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A138872
Concatenation of first 3 digits and last 3 digits of n-th even superperfect number A061652(n).
2
22, 44, 1616, 6464, 409096, 655536, 262144, 107824, 115976, 309056, 811064, 850864, 343576, 265064, 520544, 737504, 223176, 129536, 953496, 142304, 239056, 173776, 140096, 215736, 224376, 201256, 427336, 268104, 260504, 256656, 373224, 870944
OFFSET
1,1
COMMENTS
Also, concatenation of first 3 digits and last 3 digits of n-th superperfect number A019279(n), if there are no odd superperfect numbers.
CROSSREFS
KEYWORD
base,nonn,less
AUTHOR
Omar E. Pol, Apr 02 2008
EXTENSIONS
More terms from Max Alekseyev, Feb 11 2012
STATUS
approved